As a follow up for the eligibility, are US Legal Permanent Residents eligible?

Per the Eligibility Requirements in the Official Challenge Rules, “At the time of entry, the Official Representative (individual or team lead, in the case of a group project) must be age 18 or older and a U.S. citizen or permanent resident of the United States or its territories. In the case of a private entity, the business shall be incorporated in and maintain a place of business in the United States or its territories.”